diff options
Diffstat (limited to 'src/libstrongswan/utils/capabilities.c')
| -rw-r--r-- | src/libstrongswan/utils/capabilities.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/src/libstrongswan/utils/capabilities.c b/src/libstrongswan/utils/capabilities.c index c36a76efe..44a14496c 100644 --- a/src/libstrongswan/utils/capabilities.c +++ b/src/libstrongswan/utils/capabilities.c @@ -29,7 +29,9 @@ #include <utils/debug.h> -#if !defined(HAVE_GETPWNAM_R) || !defined(HAVE_GETGRNAM_R) +#if !defined(HAVE_GETPWNAM_R) || \ + !defined(HAVE_GETGRNAM_R) || \ + !defined(HAVE_GETPWUID_R) # include <threading/mutex.h> # define EMULATE_R_FUNCS #endif @@ -188,6 +190,34 @@ METHOD(capabilities_t, resolve_gid, bool, return FALSE; } +/** + * Initialize supplementary groups for unprivileged user + */ +static bool init_supplementary_groups(private_capabilities_t *this) +{ + struct passwd *pwp; + int res = -1; + +#ifdef HAVE_GETPWUID_R + struct passwd pwd; + char buf[1024]; + + if (getpwuid_r(this->uid, &pwd, buf, sizeof(buf), &pwp) == 0 && pwp) + { + res = initgroups(pwp->pw_name, this->gid); + } +#else /* HAVE_GETPWUID_R */ + this->mutex->lock(this->mutex); + pwp = getpwuid(this->uid); + if (pwp) + { + res = initgroups(pwp->pw_name, this->gid); + } + this->mutex->unlock(this->mutex); +#endif /* HAVE_GETPWUID_R */ + return res == 0; +} + METHOD(capabilities_t, drop, bool, private_capabilities_t *this) { @@ -195,6 +225,12 @@ METHOD(capabilities_t, drop, bool, prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0); #endif + if (!init_supplementary_groups(this)) + { + DBG1(DBG_LIB, "initializing supplementary groups for %u failed", + this->uid); + return FALSE; + } if (this->gid && setgid(this->gid) != 0) { DBG1(DBG_LIB, "change to unprivileged group %u failed: %s", |